CN202496127U - Multiple-cathode arc plasma generator with anode arranged on central axis - Google Patents

Abstract

The utility model provides a multiple-cathode arc plasma generator with an anode arranged on a central axis. The plasma generator adopts a structure that the central axis is a column anode, three or more cathodes are annularly and evenly arranged around the anode column, the anode and the cathodes are fixedly mounted on a same pedestal and are mutually insulated, the pedestal is provided with a water channel, an electric channel and a gas channel, the outside surface of the column anode is relatively insulated, only a head part close to the exit is bared and electric conductive, thus an electric field is formed between the cathodes and the anode, the whole generator is a sealed water cooling device, and has a cylindrical appearance, one end of the generator is provided with a plasma exit nozzle, which is used to carry out mechanical compression for arc plasma. The arc plasma formed by the plasma generator is stable and concentrated; a plasma arc can be formed, wherein the plasma arc has the properties of high arc voltage, low current, laminar flow, and long beam, the service lives of the anode and the cathodes are long, the general power of the system is large, and the working efficiency is stable and high.

Description

A kind of many negative electrodes axis anode arc plasma generator

Technical field

The utility model relates to a kind of many negative electrodes axis anode arc plasma generator of new structure, and this generator can form high power high-temperature long arc laminar flow plasma, is a kind of generating means of high temperature heat source efficiently.

Background technology

At present; Both at home and abroad mostly plasma generator is that single negative electrode, overcoat are the structure of tubular anode, and power is lower usually, generally can only adopt the mode of operation of the high electric current of low-voltage (about 30-60V) (common>500A); Because single, higher arc current is prone to cause the scaling loss of negative electrode and anode; And single arc stability is relatively poor, but so the operating time of this type of single electrode generator normal and stable operation shorter, need often to change parts.Only there is the development of part offshore company that 3 cathode plasma generators are arranged now; The also hollow pipe-type anodes that adopt cylindrical to hold of its anode more; The electric current that the single negative electrode of these generators is shared reduces greatly; Make that anode and cathode can both the stable operation long period, bring favorable economic benefit, and the domestic design and manufacturing technology of not grasping many cathode plasmas generator as yet at present.And 3 present cathode plasma generators can not produce the laminar flow beam-plasma, can not axially long-time center powder feeding, and power is less.

The utility model content

The utility model provides a kind of many negative electrodes axis anode arc plasma generator of new structure, adopts the central cylindrical anode construction, and along the annular on every side negative electrode of evenly arranging more than 3 or 3 of anode posts; Make the electric current of load of single negative electrode reduce greatly; Anode also is divided into a plurality of different parts and forms connection electric arc with corresponding negative electrode simultaneously, and arc-plasma stability is high, can form the long bundle of the little electric current laminar flow of high arc voltage plasma arc; Negative electrode and anode life are long; And the gross power of system is big, and the operating efficiency stability and high efficiency is specially adapted to technologies such as the spraying of meticulous center powder feeding normal pressure, surfacing.

The technical scheme that the utility model adopts is: adopt axis cylindrical anode structure, and along the annular negative electrode of evenly arranging more than 3 or 3 of anode posts, anode and negative electrode are installed on the same base on every side fixing; Mutually insulated, base have the water, electricity, gas passage, and the outer surface of cylindrical anode insulate relatively; Only in the exposed conduction of head near outlet; Thereby and form electric field between negative electrode, and whole generator is the tubular profile of a sealing water-cooled, an end has the plasma outlet nozzle; Nozzle carries out mechanical compress to arc-plasma, is used for the flow direction of stable plasma and makes its energy more concentrated efficient.

Its concrete instance is seen sketch map 1.

The beneficial effect of the utility model is: 1, adopt axis cylindrical anode structure; The design original creation; And the axial anode that is adopted can be a hollow tubular, can send into various powders or filamentary material to the plasma beam center of high temperature through the pipe of hollow, is used for application such as spraying, built-up welding.2, adopt anode rod evenly to arrange the cathode construction more than 3 or 3 along annular on every side; Make the electric current of single negative electrode reduce greatly; Arc-plasma stability is high, and can form the long bundle of the little electric current laminar flow of high arc voltage plasma arc, and cathode life is long; And the gross power of system is big, the operating efficiency stability and high efficiency.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further specified.

Fig. 1 is the structural representation of the utility model.Among the figure: (1) axis inner anode; (2) anode high-temperature insulating layer; (3) working gas; (4) negative electrode; (5) generator base; (6) generator body; (7) cooling water; (8) nozzle; (9) outer anode; (10) arc plasma jet.

Embodiment

Adopt cylindrical axis inner anode (1) structure; Negative electrode more than three or three (4) annular around anode rod is evenly arranged; Negative electrode and anode all are fixed on the generator base (5), so that be electrically connected and adopt cooling water (7) to cool off, also are integrated with the axial shunt assembly of gas on the base; To feed plasma working gas (3), working gas (3) also plays certain cooling effect simultaneously; The front end of generator is equipped with the nozzle (8) that is used for the compression arc plasma, and nozzle comes the position location through generator body (6) and is connected with generator base (5); Be designed with water stream channel in the whole plasma generator and be used to feed cooling water (7); Through continuous inflow and outflow, the most of parts (comprising base (5), housing (6), nozzle (8), anode (1), negative electrode (4) etc.) that contact with arc-plasma of cooling water (7) cooling; In order to make the arc channel between axis inner anode (1) and the negative electrode (4) long and stable; Outer surface at axis inner anode (1) is coated with anode high-temperature insulating layer (2); Only let the head of axis inner anode (1) expose, so just only between the head of axis inner anode (1) and negative electrode (4), produce arc channel.

Supplemental instruction: the axis inner anode can increase the pipeline of hollow, can send into various powder body materials or filamentary material to the plasma beam center of high temperature through the pipeline of hollow, is used for processed and applied such as spraying, built-up welding; Can increase simultaneously a utmost point or multipole outer anode (9) at the front end of nozzle, form stronger electric field and arc-plasma, further strengthen the stable of arc-plasma and also can further strengthen plasma generator power.

Claims (3)

1. the anode arc of negative electrode axis more than kind plasma generator is characterized in that: adopt axis cylindrical anode structure, and annular is evenly arranged the negative electrode more than 3 or 3 around the anode posts; Anode and negative electrode are installed on the same base fixing, and mutually insulated, base have the water, electricity, gas passage; The outer surface of cylindrical anode insulate relatively; Only expose conduction at head near outlet, thereby and form electric field between negative electrode, whole generator is the tubular profile of a sealing water-cooled; One end has the plasma outlet nozzle, and nozzle carries out mechanical compress to arc-plasma.

2. many negative electrodes axis anode arc plasma generator according to claim 1, its extension feature is: can be outside spray nozzle front end increases one or more anode.

3. many negative electrodes axis anode arc plasma generator according to claim 1, its extension feature is: axis column inner anode can increase the pipeline of hollow.

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